1. The designation of the internal or external unit (it is worth noting that for a shorter name, kits can begin with a combination of CS/CU):

  • C is the designation of the device — air conditioner, this letter is always the first;
  • S — indoor unit;
  • U — external unit;
  • W — windowed.

2. Belonging to the series, if it is allocated by the manufacturer. For example:

  • TZ — Compact Series;
  • Z — Etheria;
  • V — Heatcharge;
  • HZ — Nordic;

If the series is not allocated by the manufacturer in the article itself, there may be letters that mean the mode of operation:

  • E — cooling + heating;
  • S — cooling only.

3. The index of nominal performance allows you to visually determine what area the air conditioner is designed for. For example, 25 = ~2500 watts or an area of 25 m2. It is worth noting that this number usually refers to operation in cooling mode, in heating mode, usually, the indicator is slightly higher.

4. The letter responsible for the use of any technology, for example:

  • P — inverter refers to professional devices, in other words, a bet on reliability;
  • Q — technology of the Inverter+;
  • R, T — standard inverter;
  • N — low-temperature inverter, operates at -30 °C;
  • E — cooling + heating.

5. Type of indoor unit:

  • K — wall mounted;
  • F — floor (console);
  • N — channel ;
  • B1 — cassette narrow block;
  • B4 — compact cassette;
  • B — floor ceiling;
  • D3 — channel block;
  • M1 and P1 are outdoor, belong to VRV systems.

6. Connection type:

  • E — 220-240V, 50 Hz;
  • D — 230V, 50 Hz;
  • U — 230-280V, 60 Hz;
  • 1 — 115V, 60 Hz;
  • E5 — 220–240V, marking for semi-industrial;
  • E8 — 380-415V, marking for semi-industrial.

7. The letter W means that this module can be used in multi-zone systems.

At the very end there may still be the letter A, meaning that this is a low-temperature unit.